From nobody Sun Feb 8 19:47:11 2026 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 748CAA470 for ; Fri, 18 Nov 2022 18:46:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668797176; x=1700333176; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=C/N7njNkgP481j3Xh1uyhGw0c8vyZaLSJFZeI2cSHso=; b=SXJ5heIoxGyVT+Chz6jRM6pYVKoBzhbt0sax1hmE0e3V5JJZmtfNvEW2 6nqlFiZXCqP+jJsa8gxQi7hK4yKeXKd9uTMuACeDWD3CNOCumKUu3Z9mY WtERkCyJW3KysVQHkN4VXv6uwEO2UUdv/wJEKvOSHisbXRaikW1TWVoEf 7EZ8YgDpMKaZ6gu3utPFencB4/5CASR/QJcmpuAYM+GqyX5KLo9KcI5Si 3KRQldCb24bAZIsOKE3VwEjD7R1l5icCcC+HmPFdXG71HReRydmHWIWUz nLqUUcNeEyBNOpF0xTF0HPRG1bzTO2rwOgW0qmsAgFpLz19kv0WSHniCA A==; X-IronPort-AV: E=McAfee;i="6500,9779,10535"; a="314356550" X-IronPort-AV: E=Sophos;i="5.96,175,1665471600"; d="scan'208";a="314356550" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2022 10:46:14 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10535"; a="746102227" X-IronPort-AV: E=Sophos;i="5.96,175,1665471600"; d="scan'208";a="746102227" Received: from mjenkins-mobl.amr.corp.intel.com (HELO mjmartin-desk2.intel.com) ([10.209.47.242]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2022 10:46:13 -0800 From: Mat Martineau To: netdev@vger.kernel.org Cc: Paolo Abeni , davem@davemloft.net, kuba@kernel.org, edumazet@google.com, matthieu.baerts@tessares.net, mptcp@lists.linux.dev, Mat Martineau Subject: [PATCH net-next 1/2] mptcp: deduplicate error paths on endpoint creation Date: Fri, 18 Nov 2022 10:46:07 -0800 Message-Id: <20221118184608.187932-2-mathew.j.martineau@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221118184608.187932-1-mathew.j.martineau@linux.intel.com> References: <20221118184608.187932-1-mathew.j.martineau@linux.intel.com> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Paolo Abeni When endpoint creation fails, we need to free the newly allocated entry and eventually destroy the paired mptcp listener socket. Consolidate such action in a single point let all the errors path reach it. Reviewed-by: Mat Martineau Signed-off-by: Paolo Abeni Signed-off-by: Mat Martineau --- net/mptcp/pm_netlink.c | 35 +++++++++++++---------------------- 1 file changed, 13 insertions(+), 22 deletions(-) diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 9813ed0fde9b..fdf2ee29f762 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -1003,16 +1003,12 @@ static int mptcp_pm_nl_create_listen_socket(struct = sock *sk, return err; =20 msk =3D mptcp_sk(entry->lsk->sk); - if (!msk) { - err =3D -EINVAL; - goto out; - } + if (!msk) + return -EINVAL; =20 ssock =3D __mptcp_nmpc_socket(msk); - if (!ssock) { - err =3D -EINVAL; - goto out; - } + if (!ssock) + return -EINVAL; =20 mptcp_info2sockaddr(&entry->addr, &addr, entry->addr.family); #if IS_ENABLED(CONFIG_MPTCP_IPV6) @@ -1022,20 +1018,16 @@ static int mptcp_pm_nl_create_listen_socket(struct = sock *sk, err =3D kernel_bind(ssock, (struct sockaddr *)&addr, addrlen); if (err) { pr_warn("kernel_bind error, err=3D%d", err); - goto out; + return err; } =20 err =3D kernel_listen(ssock, backlog); if (err) { pr_warn("kernel_listen error, err=3D%d", err); - goto out; + return err; } =20 return 0; - -out: - sock_release(entry->lsk); - return err; } =20 int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *s= kc) @@ -1327,7 +1319,7 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *skb,= struct genl_info *info) return -EINVAL; } =20 - entry =3D kmalloc(sizeof(*entry), GFP_KERNEL_ACCOUNT); + entry =3D kzalloc(sizeof(*entry), GFP_KERNEL_ACCOUNT); if (!entry) { GENL_SET_ERR_MSG(info, "can't allocate addr"); return -ENOMEM; @@ -1338,22 +1330,21 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *sk= b, struct genl_info *info) ret =3D mptcp_pm_nl_create_listen_socket(skb->sk, entry); if (ret) { GENL_SET_ERR_MSG(info, "create listen socket error"); - kfree(entry); - return ret; + goto out_free; } } ret =3D mptcp_pm_nl_append_new_local_addr(pernet, entry); if (ret < 0) { GENL_SET_ERR_MSG(info, "too many addresses or duplicate one"); - if (entry->lsk) - sock_release(entry->lsk); - kfree(entry); - return ret; + goto out_free; } =20 mptcp_nl_add_subflow_or_signal_addr(sock_net(skb->sk)); - return 0; + +out_free: + __mptcp_pm_release_addr_entry(entry); + return ret; } =20 int mptcp_pm_get_flags_and_ifindex_by_id(struct mptcp_sock *msk, unsigned = int id, --=20 2.38.1 From nobody Sun Feb 8 19:47:11 2026 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A0D56194 for ; Fri, 18 Nov 2022 18:46:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1668797176; x=1700333176; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=W4JEU4Lb4cxuCiSU7pc8DfutGIIeuWjfS0GfiBOJA8E=; b=V5CwCRiLGmZ2J0d+RrhxurdkGLU4J+m0rkQM1yvc5OxaHmTfeEY6QMKS iGrGJHWqXODrIGy89fZY5j7ZU47LZz1xSj8Vvep71RFZJSLa/l7CSRlrT Z61scjrUiZUlxfmG4AzSzk0V+O+xtZsrARhtP1nvUpm10zicBH2S9B3CQ 6KfY47vFgBbYPDB+phr1hoRN/JUGZlRflM59MmKyOFACEwsiVejv3D+dy 6rN0Sch3Xt+NZkk93jjXXy6NN3ISBZvCWDQ9crh1wHpIO3BP9Dvx8zAKu LQd7MbhA3y8z9bR6UE1MDFpe4205gLljqnuOYaNTv9+jXhDTpX76mjl6q w==; X-IronPort-AV: E=McAfee;i="6500,9779,10535"; a="314356551" X-IronPort-AV: E=Sophos;i="5.96,175,1665471600"; d="scan'208";a="314356551" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2022 10:46:14 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10535"; a="746102229" X-IronPort-AV: E=Sophos;i="5.96,175,1665471600"; d="scan'208";a="746102229" Received: from mjenkins-mobl.amr.corp.intel.com (HELO mjmartin-desk2.intel.com) ([10.209.47.242]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Nov 2022 10:46:14 -0800 From: Mat Martineau To: netdev@vger.kernel.org Cc: Paolo Abeni , davem@davemloft.net, kuba@kernel.org, edumazet@google.com, matthieu.baerts@tessares.net, mptcp@lists.linux.dev, Mat Martineau Subject: [PATCH net-next 2/2] mptcp: more detailed error reporting on endpoint creation Date: Fri, 18 Nov 2022 10:46:08 -0800 Message-Id: <20221118184608.187932-3-mathew.j.martineau@linux.intel.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221118184608.187932-1-mathew.j.martineau@linux.intel.com> References: <20221118184608.187932-1-mathew.j.martineau@linux.intel.com> Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Paolo Abeni Endpoint creation can fail for a number of reasons; in case of failure append the error number to the extended ack message, using a newly introduced generic helper. Additionally let mptcp_pm_nl_append_new_local_addr() report different error reasons. Reviewed-by: Mat Martineau Signed-off-by: Paolo Abeni Signed-off-by: Mat Martineau --- include/net/genetlink.h | 3 +++ net/mptcp/pm_netlink.c | 24 +++++++++++++----------- 2 files changed, 16 insertions(+), 11 deletions(-) diff --git a/include/net/genetlink.h b/include/net/genetlink.h index d21210709f84..ed4622dd4828 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -125,6 +125,9 @@ static inline void genl_info_net_set(struct genl_info *= info, struct net *net) =20 #define GENL_SET_ERR_MSG(info, msg) NL_SET_ERR_MSG((info)->extack, msg) =20 +#define GENL_SET_ERR_MSG_FMT(info, msg, args...) \ + NL_SET_ERR_MSG_FMT((info)->extack, msg, ##args) + /* Report that a root attribute is missing */ #define GENL_REQ_ATTR_CHECK(info, attr) ({ \ struct genl_info *__info =3D (info); \ diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index fdf2ee29f762..d66fbd558263 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -912,10 +912,14 @@ static int mptcp_pm_nl_append_new_local_addr(struct p= m_nl_pernet *pernet, */ if (pernet->next_id =3D=3D MPTCP_PM_MAX_ADDR_ID) pernet->next_id =3D 1; - if (pernet->addrs >=3D MPTCP_PM_ADDR_MAX) + if (pernet->addrs >=3D MPTCP_PM_ADDR_MAX) { + ret =3D -ERANGE; goto out; - if (test_bit(entry->addr.id, pernet->id_bitmap)) + } + if (test_bit(entry->addr.id, pernet->id_bitmap)) { + ret =3D -EBUSY; goto out; + } =20 /* do not insert duplicate address, differentiate on port only * singled addresses @@ -929,8 +933,10 @@ static int mptcp_pm_nl_append_new_local_addr(struct pm= _nl_pernet *pernet, * endpoint is an implicit one and the user-space * did not provide an endpoint id */ - if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT)) + if (!(cur->flags & MPTCP_PM_ADDR_FLAG_IMPLICIT)) { + ret =3D -EEXIST; goto out; + } if (entry->addr.id) goto out; =20 @@ -1016,16 +1022,12 @@ static int mptcp_pm_nl_create_listen_socket(struct = sock *sk, addrlen =3D sizeof(struct sockaddr_in6); #endif err =3D kernel_bind(ssock, (struct sockaddr *)&addr, addrlen); - if (err) { - pr_warn("kernel_bind error, err=3D%d", err); + if (err) return err; - } =20 err =3D kernel_listen(ssock, backlog); - if (err) { - pr_warn("kernel_listen error, err=3D%d", err); + if (err) return err; - } =20 return 0; } @@ -1329,13 +1331,13 @@ static int mptcp_nl_cmd_add_addr(struct sk_buff *sk= b, struct genl_info *info) if (entry->addr.port) { ret =3D mptcp_pm_nl_create_listen_socket(skb->sk, entry); if (ret) { - GENL_SET_ERR_MSG(info, "create listen socket error"); + GENL_SET_ERR_MSG_FMT(info, "create listen socket error: %d", ret); goto out_free; } } ret =3D mptcp_pm_nl_append_new_local_addr(pernet, entry); if (ret < 0) { - GENL_SET_ERR_MSG(info, "too many addresses or duplicate one"); + GENL_SET_ERR_MSG_FMT(info, "too many addresses or duplicate one: %d", re= t); goto out_free; } =20 --=20 2.38.1